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Experimental investigation of turbulent boundary layer developing along a streamwise external corner (chine)
- Source :
-
Experimental Thermal & Fluid Science . May2003, Vol. 27 Issue 5, p599. 11p. - Publication Year :
- 2003
-
Abstract
- Turbulent viscous fluid flow is always accompanied by a secondary flow if the flow is not exactly two-dimensional or exactly axisymmetric. The classic example is duct flow, where counter-rotating pairs of vortices appear in each corner, distorting the isoaxialvelocity contours. The present investigation of the turbulent boundary-layer development along a streamwise external corner (chine) also shows distortion of the isoaxialvelocity contours which predicts the presence of a pair of counter-rotating vortices. These vortices or secondary flow are induced by inequality of Reynolds stresses around the corner. The direct effect of this corner flow is to increase the drag force. A series of experimental investigations at the University of Melbourne provided, in qualitative terms, the general behaviour expected from this class of flow as revealed by Elder [J. Fluid Mech. 9 (1960) 133] and Xu and Pollard [Phys. Fluids 13 (2001) 3321]. This flow is also expected to exhibit symmetry about the corner bisector. Our measurements indicate quasi-symmetry about the bisector all along the corner. [Copyright &y& Elsevier]
- Subjects :
- *BOUNDARY layer (Aerodynamics)
*VISCOUS flow
Subjects
Details
- Language :
- English
- ISSN :
- 08941777
- Volume :
- 27
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Experimental Thermal & Fluid Science
- Publication Type :
- Academic Journal
- Accession number :
- 9403688
- Full Text :
- https://doi.org/10.1016/S0894-1777(02)00274-1